Method of making paper for detachable or other leaves of books.



No7'78,377. PATENTEDDEO.2'7,1904.

R.S.ROBSON&H.G.BLAGKMER.

METHOD OF MAKING PAPER FOR DETAOHABLE OR OTHER LEAVES OF BOOKS.

APPLICATION FILED 00T.16, 1902.

llllllllllf" flllllllllllllr 1 UNITED STATES Iatented December 27, 1904.

PATENT OFFICE.

RoBERT s. RoBSoN, on SOMERVILLE, AND HERBERT 'OQBLAOKMER, OF MELBOSE, MASSACHUSETTS, ASSIGNORS o oLARKE LOOSE LEAF BOOK COMPANY, OF KITTERY, MAINE, A CORPORATION oE MAINE.

JMETHTODIOF MAKING PAPER FOR DETACHABLE OR OTHER LEAVES oF- BoKs.

SPECIFICATION forming part of Letters Patent No. 778,377, dated December 2'7; 1904.

Application filed October 16, 19 02 Serial No. 127,476.

; To all whom it may concern.-

Be it known that we, ROBERT S. RoBSoN, of Somerville, and HERBERT ,0. BLAOKMER, of Melrose, in the county of Middlesex and State of'Massachusetts, citizens of the United States, have invented a new and useful Improvement in Methods of Making Paper for the Detach able or other Leaves of Books, of which the a following is afull, clear, and exact description, referencebeing had to the accompanying drawings,forming apart of this specification, in eX-. plaining i'tsnature; i h It is desirable in booksemploying relatively thick writing-papersuch, for instance, as ledgers-and whether said books have permanent leaves or detachable ones that the leaf I be made thinner adjacent to its binding line or end in order that it may be more readily and easily turned in the opening of the book, may

he more flatly when open, and may take less space or thickness at the bend; and our invention consists in a method of decreasing the thickness of a web of paper during its manufacture from the pulp and in the paper-mak els.

ing machine, whereby the web may have produced incit during said manufacture one or more sections which shall be thinner than the main parts of the web and which thin sections shall be so arranged inthe Web as to permit the-web to be subsequently cut into leaves which shall have such end sections ad-' jacent to the binding edges or portions thereof.

In carrying our invention into effect we mount in the paper-making machine at such places in the machine as may be desirable rolls so fashioned or shaped, supported, and braced as to form in the making paper while it is yet soft and formative one or more sections, preferably relatively narrow and which shall be thinner than the main or other portions of the web. These rolls we prefer to mount over the bed upon which the web trav- We also prefer toprovide them with means whereby they can be heated, because the best effect is secured by the employment of heated rolls, which dries the water from the paper while the rolls are operating upon it to form the sections reduced in thickness.

' of the thinned sectionlof the web, and if the surface .or any part of the surface of the rolls has impressions like those indicated in the I drawings then the rolls .must be geared or otherwise connected together, so that they will not only be arranged in line with each other, but alsovso that their impressions will register with the impressions which they form in'the web of paper. We also prefer to mount the rolls in the machineso that their lateral position with respect to each other and the web may bevaried in order that the thin portions may bechanged with respect to the edge of the web as may be required for variations in the size of the leaves and for other purposes. 1

Instead of employing narrow rolls to form the thinned sections of the web, rolls of the full width of the paper may be employed and may bear slight enlargements where desired and of the width of the thinned sections, or, if desired, the thinned sections may extend crosswise the web from edge to edge instead of lengthwise of it, when the projections upon the roll or rolls for forming said thinned portion crosswise the web will extend lengthwise the rolls.

' In the drawings we have represented the rolls as adapted to form a web of paper suitable for the manufacture of detachable leaves described in the application of Herbert (J. Blackmer, filed August 25, 1902, Serial No.

Such leaves have along their binding edge holes through which binding-posts extend, and our invention is adapted not only to form such leaves, but also to establish in them a thinned section extending from top to bottom of the leaf adjacent to the binding edge, and whereby they may be bent more the binding-holes are formed and this will increase the flexibility of this end of the leaf and will decrease the quantity of paper in the assembled leaves where they are bound together. In lieu of forming the rolls to impress in the web this form of thinned sections they may be shaped to impress in the web of paper a series of narrow thinned sections, which shall be parallel with each other for the purpose of providing the leaf with the flexibility desired, or the rolls may be formed so as not to impart continuous thinned sections to the web, but to make them in lengths that shall be somewhat less than the full width of the leaf, so that there may be an unthinned portion of the leaf at each end of the thinned section and along the upper and lower edges of the leaf and to such extent strengthen the leaves at their edges.

We will now describe the invention in conjunction with the drawings, forming a part of this specification, wherein Figure 1 is a view, partly in longitudinal vertical section and partly in end elevation, of a paper-making machine equipped to produce our method. Fig. 2 is a view in plan thereof. Fig. 3 is a section of the paper web upon the dotted line 3 3 of Fig. 2. Fig. 4 is a section upon the dotted line 4 4 of Fig. 2.

Referring to the drawings, A represents a Web of paper; B B B rolls for forming therein the thinned sections of the character indicated; 6 I) 6 their supporting-shafts, and C the bed of the machine over which the web passes. The rolls represented each have a section b for forming the continuous thin section a in the web A and the lateral extensions 1) for forming the lateral thinned extensions (0 from the section at. These thinned sections a a may be arranged anywhere in the web desired and there may be also more than one line if so required. The location of these thinned sections depends upon the width of the web and the way in which it is folded or cut to form the leaves or sides of the leaves. The means for gearing the rolls together are not shown. As many of these rolls may be employed as desired. It is necessary that enough of them be used to definitely [ix in the web of paper the thinned sections, so that they shall be maintained therein during the full operation of the paper-making machine. The devices for heating the rolls are also not shown. Any of the usual expedients may be employed.

We do not confine ourselves in practicing the process to the form of rolls described nor to the number of rolls nor to the arrangement of the impressions lengthwise or crosswise the web of paper so long as they are so arranged as to provide in the finished leaves the thinned section or sections adjacent to the binding edge and extending into and across it, if desired.

Having thus fullydescribcd our invention, we claim and desire to secure by Letters Patent of the United States- 1. The process of preparing paper to have a strip or portion therein thinner than the adjacent portions of the sheet consisting in subjecting the web of paper during its manufacture and while the web is in a plastic condition to the pressure of a roll and extracting the moisture from said thinned portion of the web of paper by means of heat.

2. The process of preparing paper to have a thin, narrow section formed therein, consisting in subjecting the web of paper, du ring its manufacture and while the web is in a plastic condition, to the pressure and drying action of a heated roll or rolls.

ROBER" S. ROBSON. HERBERT C. BLAOKMER. Witnesses:

F. F. RAYMOND, 2d, SAUL SIPPERSTEIN. 

